Electric Drives Potentials on Tractors and Implements...Source: N. Rauch: Mit elektrischen Antrieben...

Dr. Joachim Sobotzik

John Deere

Global Tractor Electronic Engineering

8 July 2010

Electric DrivesPotentials on Tractors andImplements

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Agenda

• John Deere E-Premium

• Tractor / Implement Electrification

• Design Criteria

• Summary & Vision

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E-Premium 7430 and 7530

Intro at Agritechnica in 2007First Electrification in series production within AgCatalyst for Electrification within Ag

Awards:Agritechnika Gold MedalFIMA Gold MedalRoyal Show Award

…

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6030 E-Premium: vehicle features

•Flywheel mount 20kW generator

•High power 14 V system, 300amps cont.

•Full reversible radiator fan drive (screen cleaning)

•Mobile power generation• utility tools• emergency power supply• 230V 1-phase / 400V 3-phase

•Auxiliary power management to reduce parasitic power losses

•Engine rpm independant cab cooling

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10 HP addtional engine boost powerincreased power densityoptimized acceleration

Dedicated engine boost curvestarts at 1250rpmextra high capacity cooling systemoptimized fuel economy

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Electrification of Auxiliaries: What‘s next?

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A Trend?

Agritechnika 2009

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Electric power for Implements

Targets:– Enhanced plug-n-play

– Increased power density

– Controlled power distribution

– Reduced input costs

– Optimized implements, better output quality

Electrification: Control and Distribution of Power

Vision: Next level of Electrification

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A New Idea?

14 InGenics | Apr201014

Farmall 400, 1954

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… should we really continue this way?

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… or is there a vision?

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Electric Power(e.g. 2x 150kW),integr. communicationand 14V supply forcontroller on implement

Mech. Power(e.g. 150kW)

ISOBUS

Hydraulic Power(e.g. 40kW)

Modes:• Implement sends demands

• Tractor sets voltage / frequency

• Tractor provides constant U/f• Implement integrated power electronics

• …

Electric Power Interfaces: A complement

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Tractor/Implement Electrification Architectures

PTO

Inverters

InverterInverter

most common case:Tractor integrated power generationControl and Distribution on Implement

„traditional“ tractors:Implement integrated generatorControl and Distribution on Implement

Compatibility!Standardization!

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Implement Example – Sprayer

Source: K. Hahn: High Voltage Tractor-Implement Interface, SAE Commercial Vehicle Engineering Congress , 2008

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Pneumatic Planter

12V metering drive

Hydr. Fan Drive

Hydraulic Pump

Source: N. Rauch: Mit elektrischen Antrieben Traktor-Geräte Kombinationen optimieren, VDI Profi Tagung, Feb. 2010

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Rauch EDR fertilizer spreader


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Rauch EDR fertilizer spreader

„clearly arranged“ coupling

6 8 10 12 14 16 18 20 22 24 260

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disk torque [Nm]

effic

ienc

y [%

]

electrical spreaderhydraulic spreader at Power Beyondhydraulic spreader at SCVmechanical spreader

Best efficiency with optimum control


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Design Criteria

Voltage level

power level to be considered

technology from industrial automation

components from automotive applications

Safetyto be ensured during design, manufacturing, operation & service

safety by system design

system design has to avoid need for educated personal in service

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ACACDC

DCe.g.: 700VDC

3~ACe.g.: 480V

3~ACe.g.: 480V

Generator Motor

• Costs for power electronics driven by current level• same relations apply from 50…1000VAC (75…1500VDC)• 400/480VAC common in industry/on farms• e.g. 100kW @ 480VAC: 50A; 6mm2…10mm2

• Automotive e.g.: 300VDC (Prius 2002) to 700VDC (Lexus 2009)

Power Electronics(Inverter)

Design Criteria: Voltage Level

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Design Criteria: Automotive target costs

Automotive Industry:

Electric Propulsion System with a 15-year life capable ofdelivering at least 55 kW for 18 seconds and 30 kWcontinuous at a system cost of $12/kw peak by 2015.*

Susan Rogers, Manager Vehicle TechnologiesProgram: Energy Efficiency and Renewable EnergyU.S. Department of EnergyFeb 28, 2008

Traction drive system: motor, power electronics, wiring harness, 30 (50) kW

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Design Criteria: Automotive target costs

Automotive Industry:

Electric Propulsion System with a 15-year life capable ofdelivering at least 55 kW for 18 seconds and 30 kWcontinuous at a system cost of $12/kw peak by 2015.*

Susan Rogers, Manager Vehicle TechnologiesProgram: Energy Efficiency and Renewable EnergyU.S. Department of EnergyFeb 28, 2008

Traction drive system: motor, power electronics, wiring harness, 30 (50) kW

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Summary & Vision

Electric drives have entered the arena of Ag machinery

• Tractor

• Engine Auxiliaries• Traction Drives

• Implement

• Control and Distribution• New Implement Topologies (compare to industrial automation)• Optimized attachment, plug&play• Enhancement to ISOBUS and Automation

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• Tractor/implement system electrification

- Technology transfer from automation industry

- Agricultural System Engineering will apply technology to optimizeprocesses and reduce input costs

- Obvious system level benefits of electric drives will allow new types ofmachinery

- For Ag a standardized interface is one key element for success

- Mitigation scenarios have to be provided for existing equipment

- The ideas for system-level opportunities in combination withautomation, navigation and energy storage systems

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Summary & Vision

Electric Drives Potentials on Tractors and Implements...Source: N. Rauch: Mit elektrischen Antrieben...

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